Reamer.



PATBNTED DEG. l18, 1906.

171 Enga; f

ATTORNEYS- wi. TURNH.'

BEAMER Il: la., wAnuNmN, A c.

C mWf//mf n 'APrLIoATIoN FILED omfla. 1905.

HIII-ih i; UNITED Al.Terni-ins d11 Arnrnr rforeros..

` WILLIAM -TURNEY, OF HYDE PARK, KVMASSAOHUSETTS, ASSIGNOR OF ONE- HALF TO -DAVID HVREGAN, OF HYDE PARK, MASSACHUSETTS..

` REAMEs- 'Patented Dec. 18,'1906.

Application led October 18,1905. Serial No. 283,260.

that there will be no vibration, thus resultingv in an even and smoothly-inished cut.

I will describe a reamer embodying my invention and .then point out the novel features in the appended claim.

Reference is to be had to the accompany- 4 ing drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view, partly in section of a reamer embodying my invention. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is a plan showing the tapered shank of the tool. Fig. 4 is a detail illustrating the modication in the cutter. Fig. 5 is a longitudinal section showing another modication,

and Fig. 6 is a section on the line 6 6 of Fig. 5.

Referring first to the example of my improvements shown in Figs. 1, 2, and 3, 10 designates the body or stem of the tool having a shank 11 which is tapered on opposite sides, as clearly indicated in Fig. 5, and this shank 11 terminates in a threaded extension 12, engaged by 'a tightening-nut 13. Arranged on the shank 1 1 and movable outward and inward with relation thereto are `the cutting-blocks 14', having cutting-corners 15, these corners being beveled, as clearly illustrated, whereby to exert a scraping effect on the work, and they are adjusted with relation to the shank bymeans of a screw having right and left hand threads 16 17, the threaded portions engaging in tapped holes in the blocks, and the screw is passed through a slot 18 in the shank, and the expanding-screw has a central annnularchannel which receives theend of a screw 19, operating in enment. When the cutting-blocks are adjusted Y crosswise by means of the expanding-screw, the nut 13 is turned to force a washer 20 tightly against the outer ends of the blocks. ,In the example of my improvement above described the shank 11 is square in crosssection. In Figs. 5 and 6, however, I show a longitudinally-tapering and round shank 21 movable on which are interiorlytapered segmental bushings 22, which are designed by movement lengthwise of the shank to cause the adjustment of the cutting-blocks. These segmental bushings are provided with slots through which a bolt 23 passes, the said bolt also passing through holes in the cutting-blocks and through a hole 'in the shank, the threaded portion of said bolt engaging with the interior thread of an opening in one of the blocks, as shown in Fig. 5. The segmental adjusting-bushings are forced inward by means of a nut 13, similar to that Jrst described, between which and the bushings is a washer 20. Upon loosening the nut 13 the bushings are forced outward by means of plungers 24, arranged in openings in the body portion 10, and forced outward by means of springs 25. When the bushings are forced outward, it is obvious that the cutting-blocks may be drawn toward the shank by means of the bolt 23. The cutting-blocks, as described, will be made of tool-steel. In Fig. 4, however, I have shown a block having a body portion 26, which may be made of any suitable metal, and secured to the same are steel plates 27, having cutting edges similar to those first described.

It will be understood that while the cutting-blocks are described as "cutting-blocks their action is, more properly speaking, that of scraping rather than cutting.

I-Iaving thus described my invention, I claim as new and desire to secure by Letters Patent- A reamer comprising a body portion, and a reduced shank having a screw-threaded end, ysaid body portion being provided with a shoulder adjacent to the shank and said shank being provided with an elongated transverse opening and a longitudinal screwthreaded opening communicating therewith, segmental cutting-blocks having openings oppositely threaded and registering with the transverse opening of the shank, a screw traversing the transverse opening of the IOO being provided with a central annular roove,

shankiand havingits end sthreaded intojthe Inl testimony whereof I have signed my openings of the cutting-blocksI said screw naine to this speoiiioation in the presence of 1o n y Y A tWo subscribing Witnesses. a screw threaded into the longitudina ope'n-` ing of the" shanliand engagngthe'annular-"- y lLLIAM T-URNEY groove, a Washer on the end ofthe shank and Witnesses: a nut engaging the Washer for forcing the" GUsTAF M. ANDERSSON,

cutting-blocks against the shoulder. *Y i Y EDWIN D. PHELPS. 

